WO2007083460A1 - 中空糸膜モジュール - Google Patents
中空糸膜モジュール Download PDFInfo
- Publication number
- WO2007083460A1 WO2007083460A1 PCT/JP2006/324666 JP2006324666W WO2007083460A1 WO 2007083460 A1 WO2007083460 A1 WO 2007083460A1 JP 2006324666 W JP2006324666 W JP 2006324666W WO 2007083460 A1 WO2007083460 A1 WO 2007083460A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hollow fiber
- fiber membrane
- hollow
- membrane module
- cylindrical container
- Prior art date
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 371
- 239000012510 hollow fiber Substances 0.000 title claims abstract description 365
- 230000002093 peripheral effect Effects 0.000 claims abstract description 53
- 238000001914 filtration Methods 0.000 claims description 30
- 230000000903 blocking effect Effects 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 84
- 229920005989 resin Polymers 0.000 description 33
- 239000011347 resin Substances 0.000 description 33
- 238000005201 scrubbing Methods 0.000 description 15
- 239000000463 material Substances 0.000 description 13
- 239000000126 substance Substances 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 9
- 239000007787 solid Substances 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- -1 polyacrylo-tolyl Polymers 0.000 description 8
- 238000011001 backwashing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000002033 PVDF binder Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 4
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 3
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 3
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920013716 polyethylene resin Polymers 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- CHDVXKLFZBWKEN-UHFFFAOYSA-N C=C.F.F.F.Cl Chemical compound C=C.F.F.F.Cl CHDVXKLFZBWKEN-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 229920001774 Perfluoroether Polymers 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- 239000004695 Polyether sulfone Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000025 natural resin Substances 0.000 description 2
- 229920002492 poly(sulfone) Polymers 0.000 description 2
- 229920006393 polyether sulfone Polymers 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000011550 stock solution Substances 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- OFHQVNFSKOBBGG-UHFFFAOYSA-N 1,2-difluoropropane Chemical compound CC(F)CF OFHQVNFSKOBBGG-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920001780 ECTFE Polymers 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004697 Polyetherimide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229920001893 acrylonitrile styrene Polymers 0.000 description 1
- LRHPLDYGYMQRHN-UHFFFAOYSA-N butyl alcohol Substances CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 125000002573 ethenylidene group Chemical group [*]=C=C([H])[H] 0.000 description 1
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 238000009828 non-uniform distribution Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 1
- 229920001643 poly(ether ketone) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001601 polyetherimide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- SCUZVMOVTVSBLE-UHFFFAOYSA-N prop-2-enenitrile;styrene Chemical compound C=CC#N.C=CC1=CC=CC=C1 SCUZVMOVTVSBLE-UHFFFAOYSA-N 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
- B01D63/031—Two or more types of hollow fibres within one bundle or within one potting or tube-sheet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
- B01D63/04—Hollow fibre modules comprising multiple hollow fibre assemblies
- B01D63/043—Hollow fibre modules comprising multiple hollow fibre assemblies with separate tube sheets
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/08—Flow guidance means within the module or the apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/20—Specific housing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/26—Specific gas distributors or gas intakes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2315/00—Details relating to the membrane module operation
- B01D2315/04—Reciprocation, oscillation or vibration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2315/00—Details relating to the membrane module operation
- B01D2315/06—Submerged-type; Immersion type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/18—Use of gases
- B01D2321/185—Aeration
Definitions
- the present invention relates to a hollow fiber membrane module that is immersed in a treated water tank containing raw water and filtrates raw water, that is, an immersion type hollow fiber membrane module. More specifically, the present invention relates to a submerged hollow fiber membrane module that can reduce the running cost by reducing the flow rate of air for washing the hollow fiber membrane without reducing the filtration performance of the hollow fiber membrane over a long period of time. . Background art
- an immersion-type hollow fiber membrane module has a hollow fiber membrane module disposed in a treated water tank, and sucks and filters raw water containing suspended solids in the treated water tank through the hollow fiber membrane to obtain permeated water. Is used.
- a hollow fiber membrane module has a downward force of the hollow fiber membrane module. Compressed air is fed into the hollow fiber membrane module, and the hollow fiber membrane is shaken to adhere to the surface of the hollow fiber membrane. It is subjected to an air scrubbing process for washing suspended substances. It is preferred that the suspended solids that have peeled off the surface strength of the hollow fiber membrane by air scrubbing are quickly discharged out of the hollow fiber membrane module. For example, as disclosed in Patent Document 1, the suspended solids accumulate. It is convenient that the hollow fiber membrane is exposed at the upper and lower ends of the hollow fiber membrane.
- Patent Document 1 Japanese Patent Laid-Open No. 2002-346344
- Patent Document 2 Japanese Patent Laid-Open No. 2005-230813
- the present invention provides a hollow fiber membrane module in which suspended substances are easily separated from the outer surface of the hollow fiber membrane when the hollow fiber membrane is washed, and the separated suspended substances are easily discharged out of the hollow fiber membrane module.
- the purpose is to do.
- the hollow fiber membrane module of the present invention for achieving the above object is as follows.
- a cylindrical container having openings at the upper end and the lower end, a hollow fiber membrane bundle comprising a plurality of hollow fiber membranes positioned in the vertical direction in the cylindrical container
- a hollow fiber membrane fixing member for fixing the hollow fiber membrane in a state where the hollow portion of the hollow fiber membrane is open, and a lower end portion of the hollow fiber membrane, the hollow fiber membrane
- a hollow fiber membrane closing member (adhesive part B) that closes the hollow part of the cylindrical container, and the hollow fiber membrane fixing member (adhesive part A) closes the opening at the upper end of the cylindrical container.
- the hollow fiber membrane module fixed to the cylindrical container at least a part of the peripheral wall of the cylindrical container is made of a porous member, and the average open area ratio of the peripheral wall in the lower part of the cylindrical container is 25% or less.
- the hollow fiber membrane module is provided at the upper end of the cylindrical container having openings at the upper end and the lower end, a hollow fiber membrane bundle comprising a plurality of hollow fiber membranes positioned in the vertical
- an average hole area ratio of the peripheral wall in the upper part of the cylindrical container is larger than an average hole area ratio of the peripheral wall in the lower part.
- the plurality of hollow fiber membranes are divided into a plurality of small bundles each composed of a plurality of hollow fiber membranes, and the hollow fiber membrane blocking member (attachment portion) B) closes the hollow portion of each hollow fiber membrane in the small bundle, and bundles and fixes the hollow fiber membranes as a single unit. Power is preferable.
- the number of small bundles is preferably 3 to 50, and the number of hollow fiber membranes forming the small bundle is preferably 50 to 2000.
- the cylindrical container preferably has a diameter of 50 to 400 mm and a length of 500 to 3000 mm.
- the small bundle fixing member has a turbulent flow generating member on a surface thereof.
- the small bundle partition member force for partitioning the small bundle fixing members is provided between the small bundle fixing members.
- the hollow fiber membrane module of the present invention at least one hanging linear body is provided along the hollow fiber membrane forming the small bundle, and one end of the hanging linear body is the middle The other end is fixed to the small bundle fixing member, and the length of each of the small bundles in the filtration region of the hollow fiber membrane of the suspended linear body is fixed to the plurality of the bundles. It is preferable that the length of the hollow fiber membrane in the filtration region is shorter than the shortest length.
- the compressed air for air scrubbing supplied by the downward force of the hollow fiber membrane module is effectively used for cleaning the hollow fiber membrane, and the upper part of the hollow fiber membrane module Both bottom and bottom forces Suspended material is discharged efficiently. Therefore, the filtration performance of the hollow fiber membrane does not deteriorate for a long time, and the hollow fiber membrane module can be used for a long time.
- FIG. 1 is a schematic longitudinal sectional view of an example of a hollow fiber membrane module of the present invention.
- FIG. 2 is a development view of the peripheral wall of the cylindrical container of the hollow fiber membrane module shown in FIG.
- FIG. 3 is an enlarged view of a part of the peripheral wall shown in FIG.
- FIG. 4 is a schematic longitudinal sectional view of another example of the hollow fiber membrane module of the present invention.
- FIG. 5 is a schematic longitudinal sectional view of still another example of the hollow fiber membrane module of the present invention.
- FIG. 6 is a developed view of the peripheral wall of the cylindrical container of the hollow fiber membrane module shown in FIG.
- FIG. 7 is a schematic longitudinal sectional view of still another example of the hollow fiber membrane module of the present invention.
- FIG. 8 is a perspective view of an example of a small bundle fixing member of the hollow fiber membrane module shown in FIG. 1.
- FIG. 9 is a perspective view of another example of the small bundle fixing member shown in FIG.
- FIG. 10 is a perspective view of still another example of the small bundle fixing member shown in FIG.
- FIG. 11 is a schematic longitudinal sectional view of a lower part of still another example of the hollow fiber membrane module of the present invention.
- FIG. 12 is a plan view of a small bundle partition member of the hollow fiber membrane module shown in FIG. 11.
- FIG. 13 is a schematic longitudinal sectional view of still another example of the hollow fiber membrane module of the present invention.
- FIG. 14 is a schematic longitudinal sectional view of a conventional hollow fiber membrane module.
- Hollow fiber membrane module 131 Hollow fiber membrane module 132: Hollow fiber membrane 132b: Hanging linear body
- the hollow fiber membrane module of the present invention will be described below with reference to the drawings, taking as an example the case where it is used for producing clean water.
- FIG. 1 is a schematic longitudinal sectional view of an example of the hollow fiber membrane module of the present invention.
- a hollow fiber membrane module 1 of the present invention includes a cylindrical container 3 having an opening 3a at the upper end and an opening 3b at the lower end, and a number of hollows positioned vertically in the cylindrical container 3.
- a hollow fiber membrane bundle made of the yarn membrane 2 and a hollow fiber membrane fixing member provided at the upper end of the hollow fiber membrane 2 and fixing the hollow fiber membrane 2 with the hollow portion 2a of the hollow fiber membrane 2 open Adhesion A 4a and a hollow fiber membrane blocking member provided at the lower end of the hollow fiber membrane 2 and closing the hollow portion 2a of the hollow fiber membrane 2 (adhesion B) ) 4b, and the hollow fiber membrane fixing member 4a is fixed to the cylindrical container 3 in a state of closing the opening 3a at the upper end of the cylindrical container 3.
- the peripheral wall of the cylindrical container 3 is composed of the porous member 3c, and the average opening ratio of the peripheral wall in the lower part of the cylindrical container 3 is Less than 25%.
- each small bundle 8 is provided with a small bundle fixing member 4bi that closes the hollow portion at the lower end of each hollow fiber membrane 2 in the small bundle 8 and bundles and fixes the hollow fiber membranes 2 together.
- Each small bundle fixing member 4bi is positioned independently of each other with a gap 4bc between them.
- each small bundle fixing member 4bi is provided in an independent state at the lower end of each small bundle 8 hanging from the hollow fiber membrane fixing member 4a, and each position is a fluid passing through the gap 4b. It can be changed by (stock solution or air scrubbing air).
- the hollow fiber membrane blocking member that closes the hollow portion at the lower end of the hollow fiber membrane is like the hollow fiber membrane blocking member 4b of the hollow fiber membrane module 1 of FIG. It is preferably formed from a plurality of small bundle fixing members 4bi that are spaced apart and independent.
- the hollow fiber membrane blocking member may be formed of a single end plate.
- the hollow fiber membrane closing member is formed of a single end plate, the end plate is fixed to the cylindrical container 3 in a state of closing the opening 3b at the lower end of the cylindrical container 3, and is attached to the end plate.
- the hollow fiber membrane 2 has a uniform arrangement as much as possible on the surface of the plurality of fluid flow path force end plates communicating with the inside and outside of the cylindrical container 3 avoiding the portion where the lower end portion of the hollow portion of the hollow fiber membrane 2 is blocked. It is preferable that it is provided.
- a blocking material is injected into the hollow portion of the lower end portion of each hollow fiber membrane to close it, or the lower end portion of each hollow fiber membrane is pressed.
- the hollow fiber membranes may be simply closed down from the hollow fiber membrane fixing member 4a.
- the hollow fiber membrane closing member is formed by closing the hollow portion at the lower end of each hollow fiber membrane.
- the hollow fiber membrane bundle is preferably composed of hundreds to tens of thousands of hollow fiber membranes.
- the number of hollow fiber membranes forming each small bundle is several tens. Thousands are preferred.
- each small bundle fixing member (bonding part B) is arbitrary, such as a cylindrical shape, a spherical shape, a conical shape, or a pyramid shape.
- the small bundle fixing member (bonding part B) 4bi in FIG. 1 also has a cylindrical force.
- the number of hollow fiber membrane bundles divided into a large number of hollow fiber membranes and the number of hollow fiber membranes forming one small bundle are the diameter and length of the cylindrical container, Selection may be made according to the diameter of the thread membrane so as to obtain the intended effect.
- a hollow fiber membrane module in which the diameter of the cylindrical container 3 is about 50 to 400 mm, the length is about 500 to 3000 mm, and the diameter of the hollow fiber membrane 2 is about 0.5 to 2 mm is small.
- the number of bundles 8 is preferably about 3 to 1000, and more preferably 3 to 50. When the number of the small bundles 8 is small, the suspended matter discharging ability is deteriorated, and conversely, the suspended matter discharging ability is improved as the number is increased.
- the number of the hollow fiber membranes 2 forming one small bundle 8 is preferably 50 to 2000 forces. If the number of hollow fiber membranes 2 forming one small bundle 8 decreases, the number of small bundles 8 increases, and as described above, the manufacture of the hollow fiber membrane module 1 becomes complicated, and conversely, one small bundle 8 If the number of hollow fiber membranes 2 forming 8 is too large, suspended substances are easily deposited between the hollow fiber membranes 2.
- the material of the hollow fiber membrane in the hollow fiber membrane module of the present invention is not particularly limited.
- the material for the hollow fiber membrane include polysulfone, polyethersulfone, polyacrylo-tolyl, polyimide, polyetherimide, polyamide, polyetherketone, polyetheretherketone, polyethylene, polypropylene, ethylene butyl alcohol copolymer, There are various materials such as roulose, cellulose acetate, polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymer, polytetrafluoroethylene, and the like.
- the outer diameter of the hollow fiber membrane in the hollow fiber membrane module of the present invention is preferably 0.3 to 3 mm.
- the film thickness of the hollow fiber membrane is preferably 0.1 to 1 mm. If the film thickness is too small, problems such as the film breaking due to pressure occur, and conversely, if the film thickness is large, problems such as pressure loss and increase in raw material cost occur.
- the hollow fiber membrane fixing member (adhesive portion A) 4a is usually formed of a resin.
- a hollow portion of each hollow fiber membrane can be obtained by allowing fluidity of the resin to flow between a plurality of hollow fiber membranes and then solidifying the resin to fix the hollow fiber membrane and then cut the ends.
- the hollow fiber membrane fixing member (adhesive portion A) 4a is formed. This forming operation is generally called potting and is widely known.
- the hollow fiber membrane blocking member (adhesive part B) 4b or the small bundle fixing member (adhesive part B) 4bi is also usually formed from a resin. A desired amount of fluidized rosin is allowed to enter the hollow portion of the hollow fiber membrane to block the hollow portion.
- the hollow fiber membrane is fixed with the same resin and the end plate is formed.
- the small bundle method the hollow fiber membrane is fixed with the same resin and the small bundle fixing member is formed.
- epoxy resin and urethane that are general-purpose products and are inexpensive and have little influence on water quality.
- rosin, epoxy acrylate, and the like are preferably used.
- the hollow fiber membrane module of the present invention is used for filtering raw water with a water collection cap attached to the upper part of the cylindrical container and an air introduction cylinder attached to the lower part. That is, in the hollow fiber membrane module 1, the hollow portion 2a of the hollow fiber membrane 2 of the hollow fiber membrane fixing member 4a opens, and the opening force of the hollow portion 2a of the hollow fiber membrane 2 flows out to the surface 4aFl.
- a water collecting cap 5 for collecting filtered water is attached to the cylindrical container 3.
- the water collecting cap 5 has a filtered water outlet 6 for guiding the collected filtered water to the outside.
- an air introduction cylinder 7 for introducing air scrubbing air into the cylindrical container 3 is provided.
- the cylindrical container 3, the water collection cap 5, and the air introduction cylinder 7 are usually formed from a resin.
- the resin that forms these include polyolefin resin such as polyethylene resin, polypropylene, and polybutene, polytetrafluoroethylene (PTFE), perfluoroalkoxy (PFA), tetrafluoroethylene and hexafluoroethylene.
- Fluorine-based soots such as propylene fluoride (FEP), ethylene 'tetrafluoroethylene (ETFE), ethylene trifluoride chloride (PCTFE), ethylene' ethylene trifluoride chloride (ECTFE), vinylidene fluoride (PVDF) Chlorinated resin such as oil, polyvinyl chloride, polyvinyl chloride, vinylidene, polysulfone resin, polyethersulfone resin, polyallylsulfone resin, polyetherether resin, acrylonitrile-butadiene-styrene Polymer resin (ABS), Acrylonitrile-styrene copolymer resin, Polyolefin-sulfide resin, Polyamide resin, Polycarbonate resin, Polyethylene resin -Terketone resin, polyetheretherketone resin, etc. may be used alone or in combination.
- FEP propylene fluoride
- ETFE ethylene 'tetrafluoroethylene
- PCTFE ethylene
- the cylindrical container 3, the water collecting cap 5, and the air introduction cylinder 7 may be formed of a material other than the resin. In that case, aluminum, stainless steel, or the like is preferably used as the material. Furthermore, composite materials such as a resin-metal composite, glass fiber reinforced resin, and carbon fiber reinforced resin can also be used.
- the cylindrical container 3, the water collecting cap 5, and the air introduction cylinder 7 can be made of the same material or different materials.
- the peripheral wall of the cylindrical container also has a porous member force, and the average opening ratio of the peripheral wall in the lower part of the cylindrical container is 25% or less. It is said that. An example of this will be described with reference to FIGS.
- FIG. 2 is a development view of the peripheral wall of the cylindrical container 3 in FIG. 1 and 2, at least a part of the peripheral wall of the cylindrical container 3 of the hollow fiber membrane module i of the present invention is composed of the porous member 3c having a mesh-shaped opening, and the lower part of the cylindrical container 3
- the average perforation rate of the peripheral wall is 25% or less.
- the peripheral wall in the lower part of the cylindrical container 3 is a hollow fiber membrane blockage than the approximate center position (position indicated by arrow F in FIG. 2) in the longitudinal direction (arrow E direction in FIG. 2) of the cylindrical container 3. This refers to the peripheral wall of the member 4b (small bundle fixing member 4bi) side (region B surrounded by the broken line in FIG. 2).
- FIG. 3 is a partially enlarged view of the peripheral wall of the cylindrical container 3.
- the peripheral wall is divided into an aperture portion 9 and a wire portion 10.
- the projected area of region B is If X is the sum of the projected areas of the respective apertures 9 in FIG. 3, Y is the average aperture ratio of the peripheral wall in the lower part (region ⁇ ⁇ ⁇ ).
- the peripheral wall in the upper portion of the cylindrical container 3 is a hollow fiber rather than a substantially central position (a position indicated by an arrow F in FIG. 2) in the longitudinal direction (the arrow ⁇ direction in FIG. 2) of the cylindrical container 3. This refers to the peripheral wall of the membrane fixing member 4a side portion (region A in FIG. 2). Similarly, the average open area ratio of the peripheral wall in the upper part (region A) is calculated by the above formula.
- the distribution of the hole portions 9 on the peripheral wall of the cylindrical container 3 (the position of each hole portion 9 and the distribution of the hole areas) is not uniform in the longitudinal direction (vertical direction) of the cylindrical container even if the distribution is uniform. It may be a uniform distribution. A non-uniform distribution in the circumferential direction is undesirable because it causes a non-uniform flow of raw water and air. At least a part of the lower part (region B) may have a plate-like shape having no openings.
- the average porosity of the upper part (region is larger than the average porosity of the lower part (region B).
- the average porosity of the upper part (region A) is The difference in average open area ratio between the upper portion (region A) and the lower portion (region B), which is preferably 30 to 70%, is preferably 10% or more.
- a cylindrical container in which the average open area ratio in the upper half is higher than the average open area ratio in the lower half is, for example, after forming the entire peripheral wall of the cylindrical container with a porous member having a predetermined average open area ratio. It can be prepared by stacking a porous member having the same or different average aperture ratio on the lower half.
- a plate-like member having a porous shape such as a mesh shape, a net shape, or a punching metal shape
- a plate-like member having a porosity formed by a resin a cylindrical member, a metal net composed of a metal wire, a punching metal plate, and the like.
- a porous resin molded member that is inexpensive and has a small effect on water quality.
- the hollow fiber membrane module 1 is a water tank (not shown) having a depth greater than its height. Inside, soak the water collecting cap 5 side up. The water tank contains raw water containing suspended solids. When sucked from the filtered water outlet 6 side of the water collection cap 5 of the hollow fiber membrane module 1 with a pump or the like, the raw water containing the suspended solids in the water tank becomes the perforated portion 9 of the peripheral wall of the cylindrical container 3 or the air introduction cylinder. After being taken into the hollow fiber membrane module 1 through 7 and filtered through the hollow fiber membrane bundle 2, the filtered water passes from the water collecting cap 5 through the filtered water outlet 6 and is sent to the water collecting pipe (not shown). It is done.
- the small bundle fixing member (adhesive portion B) 4bi is fixed to the cylindrical container 3! Therefore, the hollow fiber membrane 2 is fixed to the small bundle by air scrubbing.
- the member (attachment B) swings with 4bi. Due to this swinging, the suspended matter adhering to the outer surface of the hollow fiber membrane 2 is peeled off.
- the suspended substance is discharged downward from the hollow fiber membrane module 1, the water containing the suspended substance is discharged through a plurality of freely moving small bundle fixing members (adhesion B) 4bi gap 4bc. For this reason, almost no suspended solids remain in the hollow fiber membrane module 1, and a reduction in filtration performance is prevented.
- FIG. 14 is a schematic longitudinal sectional view of a conventional hollow fiber membrane module.
- the hollow fiber membrane module 141 is a hollow fiber membrane bundle comprising a cylindrical container 143 provided with an opening 149 in the peripheral wall, and a plurality of hollow fiber membranes 142 accommodated in the cylindrical container 143. And have.
- the cylindrical container 143 has openings 143a and 143b at the upper and lower ends.
- the upper end portion of the hollow fiber membrane 142 is fixed by the hollow fiber membrane fixing member 144a in a state where the hollow portion of the hollow fiber membrane 142 is opened.
- the hollow fiber membrane fixing member 144a is fixed to the upper end portion of the cylindrical container 143. It is fixed tightly.
- the lower end of the hollow fiber membrane 142 is divided into a plurality of small bundles 148.
- Each small bundle 148 includes a plurality of hollow fiber membranes 142.
- Each hollow fiber membrane 142 in each small bundle 148 is fixed by a small bundle fixing member 144bi, and the end face of each hollow fiber membrane 142 is closed.
- the small bundle fixing member 144bi is not fixed to the cylindrical container 143.
- a membrane surface region force filtration region between the lower surface of the hollow fiber membrane fixing member 144a of the hollow fiber membrane 142 and the upper surface of the small bundle fixing member 144bi.
- Openings 149 are provided on the peripheral wall of the cylindrical container 143 with a uniform distribution over the entire surface.
- the average open area ratio of the peripheral wall of the cylindrical container 143 is about 30%.
- the compressed air supplied with the air piping force (not shown) installed below the hollow fiber membrane module 141 is also taken into the hollow fiber membrane module 141 through the air introduction tube 147 in the direction of the arrow G. .
- an arrow H most of the taken-in air flows out of the hollow fiber membrane module 141 from the hole portion 149 in the peripheral wall of the cylindrical container 143 below the hollow fiber membrane module 141.
- the portion of the hollow fiber membrane 142 located below the hollow fiber membrane module 141 is shaken by the compressed air, and the suspended material on the outer surface is easily peeled off.
- the portion of the hollow fiber membrane 142 that is positioned does not shake sufficiently because the compressed air is small and is not supplied with force. If the amount of compressed air to be supplied is increased, the portion of the hollow fiber membrane 142 located above can be shaken to the extent that the suspended substance on the outer surface can be peeled off. However, this method increases the running cost of water treatment.
- the hollow fiber membrane 2 can be sufficiently swung over the entire length without substantially flowing out from the hole 9 (Fig. 3) of the peripheral wall of the cylindrical container 3 at a position below the air, and the air is hollow fiber membrane module. Reaches the upper part of the hole 1 and flows out as shown by the arrow D in the upper opening 9 (Fig. 3).
- the hollow fiber membrane module 1 shown in FIG. 1 can use compressed air more effectively than the hollow fiber membrane module 141 shown in FIG. 14, and the running cost can be reduced.
- the suspended substance hardly flows out from the opening 9 (FIG. 3) of the cylindrical container 3 at a position below the hollow fiber membrane module 1 as in the compressed air.
- the suspended substance is discharged from the air introduction cylinder 7 to the lower side of the hollow fiber membrane module 1 through the gaps 4bc of the plurality of small bundle fixing members 4bi that move freely.
- the average open area ratio in the upper part (region A) of the peripheral wall of the cylindrical container 3 is expressed as the lower part of the peripheral wall. It is preferable to make it larger than the average open area ratio in (region B).
- the outer surface force of the hollow fiber membrane 2 during the air rubbing The suspended solid force peeled off
- the hollow fiber membrane module 1 is generated along with the flow of water from the bottom to the top in the hollow fiber membrane module 1 generated by the compressed air. 1 Location force with a large average open area ratio of the peripheral wall of the cylindrical container 3 above the hollow fiber membrane module 1 is discharged to the outside.
- the cylindrical container in the module has a projected area of the opening portion in the peripheral wall of the cylindrical container from the lower side to the upper side. It may be in a form (not shown) in which the force increases continuously or stepwise.
- FIG. 4 is a schematic longitudinal sectional view of still another embodiment of the hollow fiber membrane module of the present invention.
- the difference between module 41 in FIG. 4 and module 1 in FIG. 1 is that the opening 49 of the cylindrical container 43 of the module 41 in FIG. 4 is completely provided in the lower part (region B) of the cylindrical container 43. It is in the form that is not in shape (average open area ratio is 0%).
- the hollow fiber membrane module 41 of FIG. 4 has the same structure as the hollow fiber membrane module 1 of FIG. 1, and therefore the same parts are denoted by the same reference numerals.
- FIG. 5 is a schematic longitudinal sectional view of still another embodiment of the hollow fiber membrane module of the present invention. The difference between the module 51 in FIG. 5 and the module 41 in FIG.
- the hollow fiber membrane module 51 of FIG. 5 has the same structure as the hollow fiber membrane module 1 of FIG. 1, and therefore the same components are denoted by the same reference numerals.
- FIG. 6 shows a developed drawing force of the peripheral wall of the cylindrical container 53 of the module 51 shown in FIG.
- the outlet of the compressed air to which the downward force of the module 51 is also supplied is only the open portion 59 provided in a part of the upper portion of the peripheral wall of the cylindrical container 53, so that it is hollowed by the compression air.
- Yarn membrane 2 is efficiently shaken.
- suspended solids discharged through the peripheral wall of the cylindrical container 53 are reduced.
- the shape of the opening portions 9 and 59 shown in FIG. 3 and FIG. 6 is a quadrangle, but the shape of the opening portion may be a polygon such as a triangle, a pentagon, a hexagon, a circle, Ellipses and stars can also be used. These plural shapes may be mixed.
- FIG. 7 is a schematic longitudinal sectional view of still another embodiment of the hollow fiber membrane module of the present invention.
- the difference between module 71 in FIG. 7 and module 1 in FIG. 1 is that a lower carrier having an air introduction port 77a at the lower end of the cylindrical container 73 of module 71 in FIG. 7 instead of the air introduction cylinder 7 in FIG. 77 is provided.
- the module 71 of FIG. 7 has the same structure as the hollow fiber membrane module 1 of FIG. 1, and therefore the same parts are denoted by the same reference numerals.
- FIG. 8 is an enlarged perspective view of the small bundle fixing member 4bi in the hollow fiber membrane module 1 of the present invention shown in FIG.
- the small bundle fixing member 4bi also has a cylindrical body force made of greaves.
- the small bundle 8 composed of a plurality of hollow fiber membranes 2 is fixed by the resin, and the hollow part at the lower end of each hollow fiber membrane is closed by the resin entering the hollow part. Has been.
- FIG. 9 is a perspective view of another embodiment of the small bundle fixing member 4bi shown in FIG.
- the small bundle fixing member 4bj also has a cylindrical force.
- the small bundle fixing member 4bj is composed of a container 4bm and a resin filled inside thereof, and a plurality of hollow fiber membranes 2 forming a small bundle 8 by the resin. The forces are focused and the hollows at their ends are closed.
- the small bundle fixing member 4bj arranges the ends of the plurality of hollow fiber membranes 2 in the container 4bm, injects the fat, solidifies the injected fat, and fixes the hollow fiber membranes 2 At the same time, it is formed by closing the hollow part at the end.
- the container 4bm As a material for the container 4bm, for example, a resin or a metal is used, but if a metal is used, a larger weight effect can be obtained by the container 4bm.
- the metal forming the container 4bm is preferably stainless steel (SUS).
- the positions of the adjacent small bundle fixing members are shifted in the axial direction (vertical direction) of the module. I also like that.
- Each of the small bundle fixing members may be connected to the adjacent small bundle fixing member. This connection is performed by, for example, a rod-like body or a string-like body.
- each small bundle fixing member is in a state of holding hands, so that only the small bundle fixing member at a specific location is not shaken, and vibration and swinging force can be applied to other small bundles. Propagated to the fixed member.
- the position of each small bundle can be regulated gently. This improves the dispersibility of raw water and air.
- the improvement in dispersibility brings about further improvement in the effect of preventing the occurrence of stain spots on the hollow fiber membrane and the effect of preventing the entanglement between the small bundles.
- FIG. 10 is a perspective view of another embodiment of the small bundle fixing member 4bi shown in FIG.
- the small bundle fixing member 4bk also has a cylindrical force, but its lower surface is a hemisphere.
- the small bundle fixing member 4bk further includes a turbulent flow generating member 4bt provided on a part of the peripheral surface of the cylindrical body.
- the turbulent flow generating member 4bt is formed by a blade or a spiral groove provided on the surface of the small bundle fixing member 4bk.
- a module having a small bundle fixing member provided with a turbulent flow generating member is preferably used when filtering raw water containing a large amount of suspended matter. This is because the raw water and air can collide with the turbulent flow generating member and give minute vibrations and vibrations to each small bundle.
- FIG. 11 is a schematic longitudinal sectional view of the lower part of another embodiment of the hollow fiber membrane module 1 of the present invention shown in FIG.
- the difference between the module 111 in FIG. 11 and the module 1 in FIG. 1 is that in the module 111 in FIG. 11, a small bundle partition member 4bs is provided between each small bundle 8. It is a point.
- a lower cap 17 having an air inflow port (inflow port) 17a is provided in place of the air introduction tube 7 of the module 1 of FIG.
- the lower cap 17 is liquid-tightly coupled to the lower end portion of the cylindrical container 3.
- An air diffuser plate 17 b is provided inside the lower cap 17 so as to face the lower end surface of the cylindrical container 3.
- the module 111 of FIG. 11 has the same structure as the module 1 of FIG.
- FIG. 12 is a plan view of the partition member 4bs in the module 111 of FIG.
- the intermediate cutting member 4bs is formed of vertical and horizontal partition plates attached in a lattice shape inside the cylindrical container 3.
- Each small bundle fixing member 4bi is located in each space partitioned by the partition plate.
- the partition member 4bs By providing the partition member 4bs, the position of each small bundle can be gently regulated. Thereby, the dispersibility of raw
- the material of the partition member 4bs is not particularly limited, but considering the joining of the partition member 4bs and future disposal, the same material as that of the cylindrical container is preferable.
- FIG. 13 is a schematic longitudinal sectional view of another embodiment of the hollow fiber membrane module 1 of the present invention shown in FIG.
- a major difference between the module 131 in FIG. 13 and the module 1 in FIG. 1 is that at least one suspended linear body 132b is provided along the hollow fiber membrane forming each small bundle. .
- the module 131 in FIG. 13 is an improved version of the module 1 in FIG.
- module 131 in FIG. 13 has the same structure as module 1 in FIG.
- the length between the lower surface of the hollow fiber membrane fixing member 4a and the upper surface of the small bundle fixing member 4bi That is, the length force in the filtration region
- the hollow fiber membrane having a shorter length is shorter than the other hollow fiber membranes by the weight of the small bundle fixing member 4bi. A situation arises in which more or all of this is borne.
- This situation may result in the cutting of a hollow fiber membrane having a short length, or subsequent to the cutting, the cutting may spread to other hollow fiber membranes.
- the cut This causes a problem that the raw water flows into the filtered water through the hollow fiber membrane.
- it is not easy to manufacture a hollow fiber membrane module so that the lengths in the filtration region of tens to thousands of hollow fiber membranes forming one small bundle are all the same.
- At least one suspended linear body 132b is provided along the hollow fiber membrane 132 forming each small bundle 138.
- One end of the suspended linear body 132b is fixed to a hollow fiber membrane fixing member 134a fixed to the cylindrical container 3 together with one end portion of the hollow fiber membrane 132, and the other end is hollow fiber membrane 132 in the small bundle 138.
- it is fixed to a small bundle fixing member 134bi.
- the length between the lower surface of the hollow fiber membrane fixing member 134a and the upper surface of the small bundle fixing member 134bi of the suspended linear body 132b with both ends fixed, that is, the length in the filtration region is the largest in the filtration region.
- the length is set shorter than the length of the hollow fiber membrane. Note that the length of the hollow fiber membrane 132 in the filtration region and the length of the suspended linear body 132b are both the lengths of the respective linear states.
- the suspended linear body 132b Due to the presence of the suspended linear body 132b, the load of the hollow fiber membrane having a short length is reduced or eliminated, and the hollow fiber membrane is prevented from being cut by an excessive load. Naturally, for this purpose, the suspended wire 132b needs to be larger than the load-resistant hollow fiber membrane.
- the suspended linear body 132b is formed of, for example, a thread or a rod.
- the thread include a metal wire, a natural or synthetic resin fiber, a metal or a resin tube
- examples of the bar include a metal bar, a natural or synthetic resin bar, and a metal or a resin tube.
- the resin include polyethylene resin, polypropylene resin, vinyl chloride resin, and talyl resin.
- examples of the metal include stainless steel and aluminum. If the suspension body 132b is a tube, the end face should be sealed in order to prevent it from being damaged and the raw water from flowing into the filtered water. Further, it is preferable that two or more hanging linear bodies 132b are provided for each small bundle 138.
- Example 1 A filtrate pipe is connected to the filtrate outlet 6 of the hollow fiber membrane module 1 shown in Fig. 1 so that the filtrate outlet 6 faces upward, and the hollow fiber membrane module 1 is placed in the water tank containing raw water. The raw water in the water tank was filtered by immersing the water and sucking it with a water collecting cap 5 side force pump.
- a porous hollow fiber membrane made of polyvinylidene fluoride having an outer diameter of 0.9 mm and a length of about 1000 mm was used as the hollow fiber membrane 2 in the hollow fiber membrane module 1.
- the number of hollow fiber membranes 2 housed in the cylindrical container 3 was about 10,000.
- the cylindrical container 3 is made of polyethylene and has an inner diameter of about 135 mm and a length of about 1000 mm.
- the average opening rate of the peripheral wall of the cylindrical container 3 is 25% in the lower part (area B) and the upper part (area). In A), it was 37.5%.
- the shape of the aperture 9 was a square (3 mm x 3 mm) in the lower part (area B) and a rectangle (3 mm x 9 mm) in the upper part (area A).
- the thickness of the wire used for the mesh plate forming the aperture 9 was 3 mm in each of the area A and the area B.
- Urethane resin was used for each of the hollow fiber membrane fixing member 4a and the small bundle fixing member 4bi.
- the small bundle fixing member 4bi was formed into a cylindrical shape, and about 1400 hollow fiber membranes 2 were put together and each end face was closed with the urethane resin.
- the number of small bundles 8 (small bundle fixing members 4bi) was 7.
- Example 2 Using the same hollow fiber membrane module as in Example 1 except that the average open area ratio in the peripheral wall of the cylindrical container 3 was 30% on the entire surface of the peripheral wall, the raw water was similarly filtered for one week. Went. As a result, the transmembrane pressure difference of the hollow fiber membrane increased at a rate of lkPaZday.
- Example 2
- hollow fiber membrane module 131 shown in FIG. 13 raw water was filtered.
- the hollow fiber membrane 132 about 3000 porous hollow fiber membranes made of polyvinylidene fluoride having an outer diameter of 1.5 mm, an inner diameter of 0.9 mm, and a length of about 1000 mm were used.
- the cylindrical container 3 shown in FIG. 1 was used as the cylindrical container.
- the cylindrical container 3 is made of ABS and has an inner diameter of about 130 mm and a length of about 1000 mm.
- the average open area ratio of the peripheral wall of the cylindrical container 3 was the same as in Example 1.
- Urethane resin was used for each of the hollow fiber membrane fixing member 134a and the small bundle fixing member 134bi.
- the small bundle fixing member 134bi has a cylindrical shape, and the end surface is closed by putting together 430 hollow fiber membranes 132 with a force of 420.
- a stainless steel wire having a diameter of 0.5 mm was used as the suspended linear body 132b.
- the length of the filtration region of the hollow fiber membrane with the shortest filtration region (when straightened) The length of the portion excluding the hollow fiber membrane fixing member 134a and the small bundle fixing member 134bi of stainless steel wire (the length of the filtration region) (straightened) was 998mm to 1001mm When) was 988mm to 990mm
- Lake Biwa as raw water with a turbidity of 3 to 5 degrees is aspirated for 30 minutes from the collection cap 5 side with a pump to produce 0.5m 3 Zm 2 Zday filtered water, and then lm 3 Backwashing with Zm 2 Zday filtered water was performed for 1 minute, and further lOOLZmin compressed air was blown into the hollow fiber membrane module 131 through the air introduction tube 7 for 1 minute in the air scrubbing process.
- the raw water in the tank was drained once every time this filtration, backwashing, and air scrubbing were repeated several times.
- the downward force of the hollow fiber membrane module is supplied.
- the compressed air for air scrubbing is effectively used for cleaning the hollow fiber membrane, and both the upper and lower ends of the hollow fiber membrane module are effectively discharged.
- the hollow fiber membrane module of the present invention is a hollow fiber membrane module that can be used for a long period of time without reducing the filtration performance of the hollow fiber membrane for a long period of time.
Abstract
Description
Claims
Priority Applications (4)
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AU2006335824A AU2006335824A1 (en) | 2006-01-19 | 2006-12-11 | Hollow-fiber membrane module |
JP2007507593A JPWO2007083460A1 (ja) | 2006-01-19 | 2006-12-11 | 中空糸膜モジュール |
CA002646225A CA2646225A1 (en) | 2006-01-19 | 2006-12-11 | Hollow-fiber membrane module |
EP06834421A EP1974800A4 (en) | 2006-01-19 | 2006-12-11 | Hollow fiber membrane module |
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JP2006010773 | 2006-01-19 | ||
JP2006-010773 | 2006-01-19 |
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WO2007083460A1 true WO2007083460A1 (ja) | 2007-07-26 |
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PCT/JP2006/324666 WO2007083460A1 (ja) | 2006-01-19 | 2006-12-11 | 中空糸膜モジュール |
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US (1) | US20070163942A1 (ja) |
EP (1) | EP1974800A4 (ja) |
JP (1) | JPWO2007083460A1 (ja) |
KR (1) | KR20080085881A (ja) |
CN (1) | CN101351262A (ja) |
AU (1) | AU2006335824A1 (ja) |
CA (1) | CA2646225A1 (ja) |
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KR100575113B1 (ko) * | 2000-06-21 | 2006-05-03 | 가부시키가이샤 구라레 | 다공질 중공 섬유막 및 이의 제조방법 |
CA2415580C (en) * | 2000-07-10 | 2006-07-04 | Asahi Kasei Kabushiki Kaisha | Hollow thread film cartridge, hollow thread film module using the cartridge, and tank type filter |
CN100518907C (zh) * | 2005-03-09 | 2009-07-29 | 浙江欧美环境工程有限公司 | 一种漂悬式中空纤维多孔膜过滤组件 |
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2006
- 2006-08-31 US US11/513,645 patent/US20070163942A1/en not_active Abandoned
- 2006-12-11 CN CNA2006800502266A patent/CN101351262A/zh active Pending
- 2006-12-11 WO PCT/JP2006/324666 patent/WO2007083460A1/ja active Application Filing
- 2006-12-11 CA CA002646225A patent/CA2646225A1/en not_active Abandoned
- 2006-12-11 JP JP2007507593A patent/JPWO2007083460A1/ja active Pending
- 2006-12-11 EP EP06834421A patent/EP1974800A4/en not_active Withdrawn
- 2006-12-11 AU AU2006335824A patent/AU2006335824A1/en not_active Abandoned
- 2006-12-11 KR KR1020087017605A patent/KR20080085881A/ko not_active Application Discontinuation
-
2007
- 2007-01-17 TW TW096101670A patent/TW200734035A/zh unknown
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JPS62163709A (ja) * | 1986-01-14 | 1987-07-20 | Hitachi Ltd | 濾過塔 |
JPS62237908A (ja) * | 1986-04-07 | 1987-10-17 | Kurita Water Ind Ltd | 中空糸型膜分離装置用の濾過モジユ−ル |
JPS6369509A (ja) * | 1986-09-09 | 1988-03-29 | Toshiba Corp | 中空糸膜フイルタ |
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Cited By (2)
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WO2010001680A1 (ja) | 2008-07-01 | 2010-01-07 | 東レ株式会社 | 浸漬型中空糸膜モジュール |
JP5359872B2 (ja) * | 2008-07-01 | 2013-12-04 | 東レ株式会社 | 浸漬型中空糸膜モジュール |
Also Published As
Publication number | Publication date |
---|---|
EP1974800A1 (en) | 2008-10-01 |
AU2006335824A1 (en) | 2007-07-26 |
KR20080085881A (ko) | 2008-09-24 |
TW200734035A (en) | 2007-09-16 |
CN101351262A (zh) | 2009-01-21 |
US20070163942A1 (en) | 2007-07-19 |
EP1974800A4 (en) | 2009-02-25 |
CA2646225A1 (en) | 2007-07-26 |
JPWO2007083460A1 (ja) | 2009-06-11 |
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